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| author | Preetham Ramchandra <pchandru@nvidia.com> | 2018-03-12 17:10:35 +0530 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-03-14 08:24:20 -0700 |
| commit | 502717ccf7720e785fdc1c9202d1b3930fd08038 (patch) | |
| tree | 1300e0211bee5c330a86d84f574a26eb2d39d7a4 /drivers/ata | |
| parent | 43ee827b562b092f594375945aec9178f9b5cca4 (diff) | |
| download | linux-502717ccf7720e785fdc1c9202d1b3930fd08038.tar.gz linux-502717ccf7720e785fdc1c9202d1b3930fd08038.tar.bz2 linux-502717ccf7720e785fdc1c9202d1b3930fd08038.zip | |
ata: ahci_tegra: disable devslp for Tegra124
Tegra124 does not support devslp and it should be disabled.
Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci_tegra.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c index 547a6f93922c..620cdd16ef2f 100644 --- a/drivers/ata/ahci_tegra.c +++ b/drivers/ata/ahci_tegra.c @@ -166,12 +166,14 @@ struct tegra_ahci_ops { struct tegra_ahci_soc { const char *const *supply_names; u32 num_supplies; + bool supports_devslp; const struct tegra_ahci_ops *ops; }; struct tegra_ahci_priv { struct platform_device *pdev; void __iomem *sata_regs; + void __iomem *sata_aux_regs; struct reset_control *sata_rst; struct reset_control *sata_oob_rst; struct reset_control *sata_cold_rst; @@ -181,6 +183,18 @@ struct tegra_ahci_priv { const struct tegra_ahci_soc *soc; }; +static void tegra_ahci_handle_quirks(struct ahci_host_priv *hpriv) +{ + struct tegra_ahci_priv *tegra = hpriv->plat_data; + u32 val; + + if (tegra->sata_aux_regs && !tegra->soc->supports_devslp) { + val = readl(tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0); + val &= ~SATA_AUX_MISC_CNTL_1_0_SDS_SUPPORT; + writel(val, tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0); + } +} + static int tegra124_ahci_init(struct ahci_host_priv *hpriv) { struct tegra_ahci_priv *tegra = hpriv->plat_data; @@ -401,6 +415,7 @@ static int tegra_ahci_controller_init(struct ahci_host_priv *hpriv) val &= ~SATA_CONFIGURATION_0_CLK_OVERRIDE; writel(val, tegra->sata_regs + SATA_CONFIGURATION_0); + tegra_ahci_handle_quirks(hpriv); /* Unmask SATA interrupts */ @@ -446,6 +461,7 @@ static const struct tegra_ahci_ops tegra124_ahci_ops = { static const struct tegra_ahci_soc tegra124_ahci_soc = { .supply_names = tegra124_supply_names, .num_supplies = ARRAY_SIZE(tegra124_supply_names), + .supports_devslp = false, .ops = &tegra124_ahci_ops, }; @@ -488,6 +504,16 @@ static int tegra_ahci_probe(struct platform_device *pdev) if (IS_ERR(tegra->sata_regs)) return PTR_ERR(tegra->sata_regs); + /* + * AUX registers is optional. + */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + if (res) { + tegra->sata_aux_regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->sata_aux_regs)) + return PTR_ERR(tegra->sata_aux_regs); + } + tegra->sata_rst = devm_reset_control_get(&pdev->dev, "sata"); if (IS_ERR(tegra->sata_rst)) { dev_err(&pdev->dev, "Failed to get sata reset\n"); |